This collection of links are ones that I visit frequently and if you are looking for some inspiration or knowledge definitely check them out.

Strobist.com - This website is about one thing: Teaching you how to use your small flashes, off camera, to get professional results.

dpreview.com - Has everything about shooting digital photography. Reviews etc.

A photographers sketch book - Notes and tutorials on lighting and setups. Perfect for beginners and pro's alike.

David Burnett - Always has interesting and unique photographs.

The Online Photographer - Great collection of tips, tricks, and photos of all sorts. Lots of things here to keep you occupied for hours on end.

Bluehour - Lots of great nature photographs, and video tutorials as well.